Update

Assets/Scripts/GameSetup/Maze/Extensions.cs

@@ -0,0 +1,21 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public static class Extensions
+{
+    private static System.Random rng = new System.Random();
+    public static void Shuffle<T>(this IList<T> list)
+    {
+        int n = list.Count;
+        while (n > 1)
+        {
+            n--;
+            int k = rng.Next(n + 1);
+            T value = list[k];
+            list[k] = list[n];
+            list[n] = value; 
+        }
+    }
+
+}